system_lib = {
    baseUrl: system_lib.baseUrl,
    _hexArr: '0123456789ABCDEF'.split(''),
    _origin: 'http://www.tuenti.com',
    onmessage: new classes_lib.Observer('onMessage'),
    uuid: function () {
        var uuid = [];
        for (var i = 0; i < 16; i++) uuid[i] = this._hexArr[0 | Math.random()*this._hexArr.length];
        return uuid.join('');
    },
    init: function() {
        window.addEventListener('message', function(event) {
            system_lib.onmessage.fire(event);
        }, false);
        this.eapi._init();
    },
    //ripped: http://src.chromium.org/viewvc/chrome/trunk/src/chrome/renderer/resources/greasemonkey_api.js
    addStyle: function (css, id) {
        var parent = document.getElementsByTagName("head")[0];
        if (!parent) {
            parent = document.documentElement;
        }
        var style = document.createElement("style");
        style.type = "text/css";
        if (id) style.id = id;
        var textNode = document.createTextNode(css);
        style.appendChild(textNode);
        parent.appendChild(style);

        return style;
    },
    addStyleByUrl: function(url, id) {
        var style = document.createElement('link');
        style.type = 'text/css';
        style.rel = 'stylesheet';
        style.media = 'all';
        style.href = url;

        if (id) style.id = id;

        document.getElementsByTagName('head')[0].appendChild(style);
        return style;
    },
    removeStyle: function(id) {
        var el = document.getElementById(id);
        if (!el) return;
        var parent = document.getElementsByTagName("head")[0];
        if (!parent) {
            parent = document.documentElement;
        }
        parent.removeChild(el);
    },
    fireEvent: function(element, event) {
        var evt = document.createEvent("HTMLEvents");
        // event type,bubbling,cancelable
        evt.initEvent(event, true, true );
        return !element.dispatchEvent(evt);
    },
    select: function(cssrule) {
        return document.querySelectorAll(cssrule);
    },
    object: {
        clone: function(obj) {
            var clone = {};
            for(var i in obj) {
                if(typeof(obj[i])== 'object')
                    clone[i] = this.clone(obj[i]);
                else
                    clone[i] = obj[i];
            }
            return clone;
        }
    },
    //ripped: http://pajhome.org.uk/crypt/md5/md5.html
    md5: function(s) {

        var hexcase = 0;

        function rstr_md5(s)
        {
            return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
        };

        function rstr2hex(input)
        {
            try {
                hexcase
            } catch(e) {
                hexcase=0;
            }
            var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
            var output = "";
            var x;
            for(var i = 0; i < input.length; i++)
            {
                x = input.charCodeAt(i);
                output += hex_tab.charAt((x >>> 4) & 0x0F)
                +  hex_tab.charAt( x        & 0x0F);
            }
            return output;
        };

        function str2rstr_utf8(input)
        {
            var output = "";
            var i = -1;
            var x, y;

            while(++i < input.length)
            {
                /* Decode utf-16 surrogate pairs */
                x = input.charCodeAt(i);
                y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
                if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
                {
                    x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
                    i++;
                }

                /* Encode output as utf-8 */
                if(x <= 0x7F)
                    output += String.fromCharCode(x);
                else if(x <= 0x7FF)
                    output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
                        0x80 | ( x         & 0x3F));
                else if(x <= 0xFFFF)
                    output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
                        0x80 | ((x >>> 6 ) & 0x3F),
                        0x80 | ( x         & 0x3F));
                else if(x <= 0x1FFFFF)
                    output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
                        0x80 | ((x >>> 12) & 0x3F),
                        0x80 | ((x >>> 6 ) & 0x3F),
                        0x80 | ( x         & 0x3F));
            }
            return output;
        };


        function rstr2binl(input)
        {
            var output = Array(input.length >> 2);
            for(var i = 0; i < output.length; i++)
                output[i] = 0;
            for(var i = 0; i < input.length * 8; i += 8)
                output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (i%32);
            return output;
        };

        function binl2rstr(input)
        {
            var output = "";
            for(var i = 0; i < input.length * 32; i += 8)
                output += String.fromCharCode((input[i>>5] >>> (i % 32)) & 0xFF);
            return output;
        };

        function binl_md5(x, len)
        {
            /* append padding */
            x[len >> 5] |= 0x80 << ((len) % 32);
            x[(((len + 64) >>> 9) << 4) + 14] = len;

            var a =  1732584193;
            var b = -271733879;
            var c = -1732584194;
            var d =  271733878;

            for(var i = 0; i < x.length; i += 16)
            {
                var olda = a;
                var oldb = b;
                var oldc = c;
                var oldd = d;

                a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
                d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
                c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
                b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
                a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
                d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
                c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
                b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
                a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
                d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
                c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
                b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
                a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
                d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
                c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
                b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

                a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
                d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
                c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
                b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
                a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
                d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
                c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
                b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
                a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
                d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
                c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
                b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
                a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
                d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
                c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
                b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

                a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
                d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
                c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
                b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
                a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
                d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
                c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
                b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
                a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
                d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
                c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
                b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
                a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
                d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
                c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
                b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

                a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
                d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
                c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
                b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
                a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
                d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
                c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
                b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
                a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
                d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
                c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
                b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
                a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
                d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
                c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
                b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

                a = safe_add(a, olda);
                b = safe_add(b, oldb);
                c = safe_add(c, oldc);
                d = safe_add(d, oldd);
            }
            return Array(a, b, c, d);
        };

        function md5_cmn(q, a, b, x, s, t)
        {
            return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
        };

        function md5_ff(a, b, c, d, x, s, t)
        {
            return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
        };

        function md5_gg(a, b, c, d, x, s, t)
        {
            return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
        };

        function md5_hh(a, b, c, d, x, s, t)
        {
            return md5_cmn(b ^ c ^ d, a, b, x, s, t);
        };

        function md5_ii(a, b, c, d, x, s, t)
        {
            return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
        };

        function safe_add(x, y)
        {
            var lsw = (x & 0xFFFF) + (y & 0xFFFF);
            var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
            return (msw << 16) | (lsw & 0xFFFF);
        };

        function bit_rol(num, cnt)
        {
            return (num << cnt) | (num >>> (32 - cnt));
        };

        return rstr2hex(rstr_md5(str2rstr_utf8(s)));
    },
    url: {
     getParam: function(name, surl) {
            name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");

            var regexS = "[#\\?&]"+name+"=([^&#]*)";
            var regex = new RegExp( regexS );

            var url = window.location.href;
            if (surl) url = surl;

            var results = regex.exec( url );

            if( results == null )
                return undefined;
            else
                return results[1];
     }
    },
    //Nota: localStorage es incompatible con Better Privacy para firefox
    storage: {
        get: function(key, defaultValue) {

            if (!key) return;

            try {
                var value = localStorage.getItem(key);
            }catch (e) {
                console.error('error: storage.get');
                return;
            }

            if (!value) return defaultValue;

            var type = value[0];
            value = value.substring(1);

            switch (type) {
                case 'b':
                    return value == 'true';
                case 'n':
                    return Number(value);
                default:
                    return value;
            }
        },
        set: function (key, value) {
            if (!key) return;
            if (value) value = (typeof value)[0] + value;

            try {
                localStorage.setItem(key, value);
            } catch (e) {
                console.error('error: storage.set');
            }
        },
        remove: function(key) {
            try {
                localStorage.removeItem(key);
            } catch (e) {
                console.error('error: storage.remove');
            }
        }
    },
    visual: {
        //ripped: mochikit 1.4.2
        realPosition: function(el) {
            var rx = 0, ry = 0;
            do {
                ry += el.offsetTop  || 0;
                rx += el.offsetLeft || 0;
                el = el.offsetParent;
                if (el) {
                    if (el.style.position === 'relative' || el.style.position === 'absolute') {
                        break;
                    }
                }
            } while (el);

            return {x: rx, y: ry};
        },
        thumbnalize: function(w, h, mw, mh) {
            if (h > mw || w > mh) {
                if (w == h) {
                    w = h = mh;
                }
                else if (w > h) {
                    var delta = w/mw;
                    h = Math.round(h * (1/delta));
                    w = mw;
                }
                else if (h > w) {
                    var delta = h/mh;
                    w = Math.round(w * (1/delta));
                    h = mh;
                }
            }
            return { width: w, height: h }
        }
    },
    eapi: {
        _stack: {},
        onMessage: function(event) {
            
            if (event.origin != system_lib._origin)
                return;

            var data = JSON.decode(event.data);

            if (data.type != 'rp') return;

            var callback = system_lib.eapi._stack[data.id];

            delete system_lib.eapi._stack[data.id];

            if (callback) callback.call(null, data.response);
        },
        sendRequest: function(request, callback) {
            request.type = 'rq';
            request.id = system_lib.uuid();
            if (callback) this._stack[request.id] = callback;

            window.postMessage(JSON.encode(request), system_lib._origin);
        },
        _init: function() {
            system_lib.onmessage.add(this);
            this.updateVersion();
        },
        ajax: function (data) {
            var rq = {};
            rq.op = 'ajax';
            var callback = data.onload;

            delete data.onload;
            delete data.onerror;
            delete data.onreadystatechange;

            rq.data = data;

            this.sendRequest(rq,callback);
        },
        updateVersion: function() {
            var rq = {};
            rq.op = 'version';
            this.sendRequest(rq, function(response) {system_lib.eapi.version = response;});
        }
    }
};

system_lib.init();
